计算:(1)(-12)-5+(-14)-(-39)(2)-32÷(-3)2+3×(-2)+|-4|(3)[(-16)-(-512)+215]×(-60)(4)-...

2023-07-06 09:10发布

这道初中数学的题目是:
计算:
(1)(-12)-5+(-14)-(-39)
(2)-32÷(-3)2+3×(-2)+|-4|
(3)[(-
1
6
)-(-
5
12
)+
2
15
]×(-60)
(4)-
4
5
×[(-
1
2
)÷(0.75-1)+(-2)5]
1条回答
倔强
1楼-- · 2023-07-06 09:22
这道初中数学题的正确答案为:
(1)(-12)-5+(-14)-(-39)
=-12-5-14+39
=-31+39
=8;

(2)-32÷(-3)2+3×(-2)+|-4|
=-9÷9-6+4
=-1-6+4
=-3;

(3)[(-
1
6
)-(-
5
12
)+
2
15
]×(-60)
=
1
6
×60-
5
12
×60-
2
15
×60
=10-25-8
=-23;

(4)-
4
5
×[(-
1
2
)÷(0.75-1)+(-2)5]

=-
4
5
×[(-
1
2
)÷(-
1
4
)-32]
=-
4
5
×[2-32]
=-
4
5
×[-30]
=24.
解题思路 16

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